Inner box of a packing box



FIG. 1 is a perspective view of an inner box of a packing box showing my new design;

FIG. 2 is a front view thereof;

FIG. 3 is a rear view thereof;

FIG. 4 is a left side view thereof;

FIG. 5 is a right side view thereof;

FIG. 6 is a top view thereof;

FIG. 7 is a bottom view thereof; and

FIG. 8 is the other perspective view showing the inner box of a packing box; and,

FIG. 9 is an exploded perspective view of the inner box of a packing box for reference.

The broken lines shown represent unclaimed subject matter and form no part of the claimed design. 

CLAIM The ornamental design for an inner box of a packing box, as shown and described. 